Human Body Pre-Assessment (Grade 7)

2.

Rate, on a scale of 1 – 4, 1 being the lowest and 4 being the highest, how much do you already know about the human body?

3.

A sequence of structures is shown from simplest to most complex. Which structure is missing? (Standard 1.2a) Tissue à à system of the body à organism

Cell
Organelle
Population
Organ
Community

Correct Answer

A. Organ

Explanation

The missing structure in the sequence is "Population". The given sequence starts with the simplest structure, which is a "Cell", then progresses to "Organelle", "Tissue", "Organ", "System of the body", and finally "Organism". "Population" does not fit in this sequence as it refers to a group of organisms of the same species in a particular area, and is not a structure within an individual organism.

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4.

Identify the organ in the human body that performs similar functions to the smooth endoplasmic reticulum in your cells (Standard 1.3a).

Heart
Brain
Liver
Hypothalamus
Ovaries

Correct Answer

A. Liver

Explanation

The liver performs similar functions to the smooth endoplasmic reticulum in cells. The smooth endoplasmic reticulum is responsible for lipid metabolism, detoxification, and drug metabolism. Similarly, the liver is involved in the synthesis and breakdown of lipids, detoxification of harmful substances, and metabolism of drugs. It also plays a crucial role in the regulation of glucose levels in the body. Therefore, the liver is the organ in the human body that performs similar functions to the smooth endoplasmic reticulum.

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5.

The diagrams below illustrate the pathway and time frame for the digestion of a hamburger consisting of ground beef ketchup and a whole wheat bun. During which time period does most of the digestive action of bile and pancreatic juice occur? (Standard 1.2b)

6:03 p.m.-6:05 p.m.
6:05 p.m.-6:08 p.m.
10:15 p.m.-9:50 a.m.
9:50 a.m.-1:00 p.m.
1:00 p.m.-1:05 p.m.

Correct Answer

A. 10:15 p.m.-9:50 a.m.

Explanation

The correct answer is 10:15 p.m.-9:50 a.m. This is the time period during which most of the digestive action of bile and pancreatic juice occurs. Bile is produced by the liver and stored in the gallbladder, and it helps break down fats in the hamburger. Pancreatic juice, produced by the pancreas, contains enzymes that break down proteins, carbohydrates, and fats. The digestion of a hamburger, which consists of ground beef, ketchup, and a whole wheat bun, involves the breakdown of proteins, carbohydrates, and fats, so the action of bile and pancreatic juice is most significant during this time period.

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6.

In humans, the concentration of carbon dioxide in the plasma (Standard 5.3 b):

Causes increased production of hydrochloric acid
Regulates gastric acid production by forming carbonic acid
Regulates breathing rate by its effect on the medulla
Causes inflammation of the tissues of the bronchial tubes
Causes increased production of insulin by the pancreas

Correct Answer

A. Regulates breathing rate by its effect on the medulla

7.

A malfunction of the lymph nodes would most likely interfere with the (Standard 1.2 d)

Release of carbon dioxide into the lymph
Filtering of glucose from the lymph
Release of oxygen into the lymph
Filtering of bacteria from the lymph
Synthesis of proteins in the lymph

Correct Answer

A. Filtering of bacteria from the lymph

Explanation

A malfunction of the lymph nodes would most likely interfere with the filtering of bacteria from the lymph. Lymph nodes are responsible for filtering out harmful substances, such as bacteria, from the lymph fluid. If the lymph nodes are not functioning properly, they may not be able to effectively remove bacteria, leading to an increased risk of infection and other health issues.

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8.

A student accidentally places her hand on a tack and quickly pulls her hand away. The tack represents

A stimulus
An impulse
A response
An effector
A pathogen

Correct Answer

A. A stimulus

Explanation

When the student accidentally places her hand on a tack, it causes a physical sensation and triggers a reaction. The tack acts as a stimulus, which is any factor that elicits a response or reaction in an organism. In this case, the student's hand touching the tack is the stimulus that prompts her to quickly pull her hand away in response to the unpleasant sensation.

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9.

The diagram represents the pathway of blood throughout the body. Which structure carries oxygenated blood to the body?

1
2
3
7
8

Correct Answer

A. 8

Explanation

Structure 8 carries oxygenated blood to the body.

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10.

In healthy bodies, potassium is found in concentrations between 3.5 to 5.0 mEq per liter of blood. It regulates water in the blood, assists in protein synthesis, and allows communication to take place between nerve cells. Potassium is naturally found in avocados, bananas, potatoes, cantaloupe, milk, oranges, raisins, salmon, and tomatoes. If an individual consumes some of these foods and immediately has a blood test, his potassium concentration may be above 7.0 mEq/L. How will the body respond to this? (Standard 1.1e)

The nervous system will work twice as quickly.
The excretory system will restore homeostasis.
The immune system will increase antibody production.
The circulatory system will adjust to a new environment.
The endocrine system will respond by releasing adrenaline.

Correct Answer

A. The excretory system will restore homeostasis.

Explanation

When an individual consumes foods rich in potassium, the concentration of potassium in their blood may increase. In order to maintain balance, the excretory system will respond by increasing the excretion of potassium through urine. This process helps restore homeostasis, ensuring that the potassium levels in the blood return to the normal range of 3.5 to 5.0 mEq/L. The other options mentioned in the question, such as the nervous system working twice as quickly or the immune system increasing antibody production, are not directly related to the regulation of potassium levels in the blood.

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11.

The figure below shows the interaction between pancreatic hormones and levels of glucose in the blood. This process is an example of (Standard 1.2c):

Feedback
Digestion
Excretion
Nutrition
Hydrolysis

Correct Answer

A. Feedback

Explanation

The figure shows the interaction between pancreatic hormones and levels of glucose in the blood. This process is an example of feedback. Feedback refers to a mechanism in which the output or response of a system influences the input or stimulus in order to maintain stability or homeostasis. In this case, the pancreatic hormones are responding to the levels of glucose in the blood and adjusting their secretion accordingly to regulate blood sugar levels. This feedback loop helps to maintain the balance of glucose in the body.

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12.

A pulse can be detected most easily in (Standard 1.2b, 5.3a)

An artery
A vein
A capillary
A lacteal
A lymph node

Correct Answer

A. An artery

Explanation

An artery is the correct answer because arteries carry oxygenated blood away from the heart and towards the body's tissues. The pulsating nature of the blood flow in arteries makes it easier to detect a pulse. Veins, on the other hand, carry deoxygenated blood back to the heart and do not have the same pulsating flow. Capillaries are tiny blood vessels that connect arteries and veins and are too small to easily detect a pulse. Lacteals are lymphatic vessels found in the small intestine that absorb dietary fats, and lymph nodes are part of the lymphatic system and are not directly involved in blood circulation.

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Human Body Pre-assessment (Grade 7)

Rate, on a scale of 1 – 4, 1 being the lowest and 4 being the highest, how interested are you in the human body?

Quiz Preview

Rate, on a scale of 1 – 4, 1 being the lowest and 4 being the highest, how much do you already know about the human body?

A sequence of structures is shown from simplest to most complex. Which structure is missing? (Standard 1.2a) Tissue à à system of the body à organism

Identify the organ in the human body that performs similar functions to the smooth endoplasmic reticulum in your cells (Standard 1.3a).

The diagrams below illustrate the pathway and time frame for the digestion of a hamburger consisting of ground beef ketchup and a whole wheat bun. During which time period does most of the digestive action of bile and pancreatic juice occur? (Standard 1.2b)

In humans, the concentration of carbon dioxide in the plasma (Standard 5.3 b):

A malfunction of the lymph nodes would most likely interfere with the (Standard 1.2 d)

A student accidentally places her hand on a tack and quickly pulls her hand away. The tack represents

The diagram represents the pathway of blood throughout the body. Which structure carries oxygenated blood to the body?

The figure below shows the interaction between pancreatic hormones and levels of glucose in the blood. This process is an example of (Standard 1.2c):

A pulse can be detected most easily in (Standard 1.2b, 5.3a)