Bio Exam
Bio Exam
- 1.
The basic types of tissues in the human body are
- A.
Cell, organ, and organ system
- B.
Sight, smell, and hearing
- C.
Thyroid, trachea, adenoid, and bronchus
- D.
Muscle, nervous, connective, and epithelial
Correct Answer
D. Muscle, nervous, connective, and epithelial -
- 2.
The levels of organization in the body include
- A.
Endocrine, respiratory, digestive, and nervous
- B.
Cells, tissues, organs, and organ systems
- C.
Cells, tissues, and functions
- D.
Lymphatic, respiratory, and circulatory
Correct Answer
B. Cells, tissues, organs, and organ systems -
- 3.
How many organ systems make up the human body?
- A.
4
- B.
5
- C.
8
- D.
11
Correct Answer
D. 11 -
- 4.
What type of tissue lines your internal organs
- A.
Epithelial
- B.
Connective
- C.
Nerve
- D.
Muscle
Correct Answer
A. Epithelial -
- 5.
Which type of tissue provides support for the body?
- A.
Epithelial
- B.
Connective
- C.
Nerve
- D.
Muscle
Correct Answer
B. Connective -
- 6.
Which process enables the body to maintain a stable temperature?
- A.
Heating
- B.
Circulation
- C.
Feedback inhibition
- D.
Cellular activity
Correct Answer
C. Feedback inhibition -
- 7.
Which system coordinates the body’s response to changes in its internal and external environment?
- A.
Lymphatic
- B.
Nervous
- C.
Excretory
- D.
Reproductive
Correct Answer
B. Nervous -
- 8.
Neurons are classified by the
- A.
Direction in which they carry impulses
- B.
Amount of metabolic activity that takes place
- C.
Number of dendrites that branch out
- D.
Number of impulses that they carry
Correct Answer
A. Direction in which they carry impulses -
- 9.
What begins when a neuron is stimulated by another neuron or by the environment?
- A.
A threshold
- B.
An action potential
- C.
An impulse
- D.
A dendrite
Correct Answer
C. An impulse -
- 10.
For a neuron to reach an action potential, it must
- A.
Release electrons
- B.
Absorb calcium
- C.
Reverse the electrical charge across the cell membrane
- D.
Take in sodium ions
Correct Answer
C. Reverse the electrical charge across the cell membrane -
- 11.
Refer to the figure below. The cell body of a neuron collects information from which structure?
- A.
A
- B.
B
- C.
C
- D.
E
Correct Answer
A. A -
- 12.
When an impulse reaches the end of a neuron, it triggers the release of
- A.
Neurotransmitters
- B.
Sodium ions
- C.
Dendrites
- D.
Receptors
Correct Answer
A. Neurotransmitters -
- 13.
What is the function of neuroransmitters?
- A.
To transmit nerve impulses through dendrites
- B.
To stimulate the production of epinephrine
- C.
To transmit nerve impulses across synapses
- D.
None of the above
Correct Answer
C. To transmit nerve impulses across synapses -
- 14.
During its resting state, the electrical charge INSIDE the neuron is _____________ compared to the outside.
- A.
Positive (+70mv)
- B.
Neutral (0mv)
- C.
Negative (-70mv)
- D.
It differs greatly depending upon what part of the neuron is examined
Correct Answer
C. Negative (-70mv) -
- 15.
During the neuron's resting state, large amounts of positive ________ ions are found in the extracellular fluid, whereas relatively more positive ________ ions are found inside the cell.
- A.
Potassium, chloride
- B.
Chloride, anions
- C.
Sodium, lithium
- D.
Sodium, potassium
Correct Answer
D. Sodium, potassium -
- 16.
The reason why there is a sudden shift in the electrical potential of the neuron (from about -70mv to about +40mv) during an action potential is largely due to the sudden influx of _________ ions.
- A.
Sodium
- B.
Calcium
- C.
Potassium
- D.
Chloride
Correct Answer
A. Sodium -
- 17.
A pulmonary artery carries blood from
- A.
The right ventricle to the lung
- B.
The lung to the left atrium
- C.
One lung to the other
- D.
The pulmonary vein to the heart
Correct Answer
A. The right ventricle to the lung -
- 18.
In which direction would the oxygen rich blood flow in this diagram
- A.
From C to D
- B.
From B to A
- C.
From A to C
- D.
From C to A
Correct Answer
C. From A to C -
- 19.
Why is it difficult for your body to return blood from your feet when you sit for too long?
- A.
Blood has to travel a greater distance.
- B.
Skeletal muscles are not squeezing the veins.
- C.
Gravity makes the blood flow backward.
- D.
The heart does not beat fast enough at rest.
Correct Answer
B. Skeletal muscles are not squeezing the veins. -
- 20.
The heart's natural pacemaker is the
- A.
Medulla and pons
- B.
Diaphragm
- C.
Right ventricle
- D.
Sinoatrial (SA) node
Correct Answer
D. Sinoatrial (SA) node -
- 21.
What facilitates diffusion into and out of capillaries
- A.
They are located throughout the body
- B.
They are so small that blood cells move in single file
- C.
Their walls are only one cell thick
- D.
Their muscles contract and relax
Correct Answer
C. Their walls are only one cell thick -
- 22.
The first contraction of the heart takes place in the
- A.
Atria
- B.
Ventricles
- C.
Valves
- D.
Septum
Correct Answer
A. Atria -
- 23.
The roads of a city are similar to what structures in the circulatory system
- A.
Heart
- B.
Air passageway
- C.
Blood vessels
- D.
Blood
Correct Answer
C. Blood vessels -
- 24.
In the walls of the heart, the thick layer of muscle is called the
- A.
Epithelial tissue layer
- B.
Pericardium
- C.
Connective tissue layer
- D.
Myocardium
Correct Answer
D. Myocardium -
- 25.
Which is the correct direction of blood flow?
- A.
Right atrium → right ventricle → pulmonary artery
- B.
Right atrium → left atrium → pulmonary artery
- C.
Left ventricle → pulmonary artery → aorta
- D.
Left ventricle → left atrium → aorta
Correct Answer
A. Right atrium → right ventricle → pulmonary artery -
- 26.
In the heart, the mixing of oxygen-rich and oxygen-poor blood is prevented by the
- A.
Mitral valve
- B.
Tricuspid valve
- C.
Septum
- D.
Pericardium
Correct Answer
C. Septum -
- 27.
Compared with the walls of arteries, the walls of veins
- A.
Are thicker
- B.
Are thinner
- C.
Lack valves
- D.
Have more resistance
Correct Answer
B. Are thinner -
- 28.
Which of the following are the smallest of the blood vessels?
- A.
Arteries
- B.
Veins
- C.
Lymphatic cells
- D.
Capillaries
Correct Answer
D. Capillaries -
- 29.
The function of valves in the human circulatory system is to
- A.
Stimulate the heartbeat
- B.
Accelerate the flow of blood
- C.
Prevent the backward flow of blood
- D.
Serve as a cushion to prevent friction
Correct Answer
C. Prevent the backward flow of blood -
- 30.
Which of the following is NOT an effect of exercise on veins?
- A.
Exercise helps force blood through the veins.
- B.
Exercise helps keep blood from accumulating and stretching veins.
- C.
Exercise helps keep the walls around veins strong.
- D.
Exercise helps increase the size of veins.
Correct Answer
D. Exercise helps increase the size of veins. -
- 31.
Which of the following is true about blood pressure?
- A.
It is not affected by atherosclerosis
- B.
It is lower in veins than in arteries
- C.
It drops a great deal when traveling through arteries
- D.
Diastolic pressure is higher than systolic pressure
Correct Answer
B. It is lower in veins than in arteries -
- 32.
What is the function of the central nervous system (CNS)?
- A.
To relay messages
- B.
To process information
- C.
To analyze information
- D.
All of the above
Correct Answer
D. All of the above -
- 33.
Which of the following is a function of the cerebrum?
- A.
Controls conscious activities of the body
- B.
Controls heart rate
- C.
Controls blood pressure
- D.
Controls breathing
Correct Answer
A. Controls conscious activities of the body -
- 34.
The region of the brain that recognizes hunger is the
- A.
Brain stem
- B.
Medulla oblongata
- C.
Hypothalamus
- D.
Thalamus
Correct Answer
C. Hypothalamus -
- 35.
The ability to move your right hand is controlled by the
- A.
Left hemisphere of the cerebrum
- B.
Right hemisphere of the cerebrum
- C.
Both the left and right hemispheres of the cerebrum
- D.
Neither hemisphere of the cerebrum
Correct Answer
A. Left hemisphere of the cerebrum -
- 36.
Which division(s) of the peripheral nervous system transmit(s) impulses from sense organs to the central nervous system?
- A.
Sensory division
- B.
Motor division
- C.
Sensory and motor divisions
- D.
Spinal cord divisions
Correct Answer
A. Sensory division -
- 37.
Sense organs are part of the
- A.
Peripheral nervous system
- B.
Central nervous system
- C.
Autonomic nervous system
- D.
Parasympathetic nervous system
Correct Answer
A. Peripheral nervous system -
- 38.
What are the two divisions of the peripheral nervous system (PNS)?
- A.
Brain and spinal cord
- B.
Thalamus and hypothalamus
- C.
Somatic and autonomic
- D.
Sensory and motor
Correct Answer
D. Sensory and motor -
- 39.
Which labeled structure in the figure below creates pressure waves in the cochlea?
- A.
A
- B.
B
- C.
C
- D.
D
Correct Answer
A. A -
- 40.
Which labeled structure in the figure above sends impulses to the brain that enable it to determine body motion and position?
- A.
A
- B.
B
- C.
C
- D.
D
Correct Answer
B. B -
- 41.
Which type of sensory receptor helps humans detect light?
- A.
Thermoreceptor
- B.
Mechanoreceptor
- C.
Photoreceptor
- D.
Chemoreceptor
Correct Answer
C. Photoreceptor -
- 42.
The brain is connected to the spinal cord by the
- A.
Cerebrum
- B.
Brain stem
- C.
Sensory cortex
- D.
Vertebrae
Correct Answer
B. Brain stem -
- 43.
Nerve pathways that produce responses without involving the brain are called
- A.
Reflex arcs
- B.
Resting potentials
- C.
Parasympathetic nerves
- D.
Cortical areas
Correct Answer
A. Reflex arcs -
- 44.
Hair cells in the inner ear contain mechanoreceptors that detect
- A.
Sound
- B.
Fluid
- C.
Impulses
- D.
Vibrations
Correct Answer
D. Vibrations -
- 45.
What happens to impulses generated by chemoreceptors in the nose and the mouth?
- A.
They are dissolved by mucus
- B.
They are passed through the optic nerve
- C.
They are transmitted to the brain
- D.
They are stored in a series of glands
Correct Answer
C. They are transmitted to the brain -
- 46.
Which part of the eye contains the rods and cones?
- A.
Cornea
- B.
Retina
- C.
Iris
- D.
Lens
Correct Answer
B. Retina -
- 47.
About what percentage of the mass of the human body is made up of muscle?
- A.
Less than 10 percent
- B.
20 percent
- C.
30 percent
- D.
Over 40 percent
Correct Answer
D. Over 40 percent -
- 48.
Where is the protein called actin located in the body?
- A.
ATP molecules
- B.
Thin filaments
- C.
Myosin filaments
- D.
Acetylcholine neurotransmitters
Correct Answer
B. Thin filaments -
- 49.
What happens when the thin filaments in a muscle fiber slide over the thick filaments?
- A.
A muscle contracts
- B.
A muscle relaxes
- C.
A muscle both contracts and relaxes
- D.
A muscle neither contracts nor relaxes
Correct Answer
A. A muscle contracts -
- 50.
Myosin and actin make up
- A.
Osteoblasts
- B.
Collagen
- C.
Myofibrils
- D.
Red marrow
Correct Answer
C. Myofibrils -
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Feb 18, 2013Quiz Edited by
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May 20, 2012Quiz Created by
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