Bio IB Topic 6.5-6
- 1.
![Which structure is responsible for passing messages directly to effector organs? - ProProfs]( "Which structure is responsible for passing messages directly to effector organs?")
Which structure is responsible for passing messages directly to effector organs?- A.
A.
- B.
B.
- C.
C.
- D.
D.
- 2.After depolorization what happens to restore the resting potential?
- A.
Sodium channels open and sodium ions diffuse out of the neuron
- B.
Potassium channels open and potassium ions diffuse into the neuron
- C.
Potassium channels open and potassium ions diffuse out of the neuron
- D.
Sodium channels open and sodium ions diffuse into the neuron
- 3.Which cells secrete insulin?
- A.
Beta-cells of the pancreas
- B.
Cells of the liver
- C.
Alpha-cells of the pancreas
- D.
Epithelial cells of the intestine
- 4.Which organ secretes FSH (follicle-stimulating hormone)?
- A.
Ovary
- B.
Testis
- C.
Pituitary gland
- D.
Placenta
- 5.In the menstrual cycle in humans, which hormone causes the wall of the follicle to develop after ovulation and to secrete more progesterone?
- A.
Estrogen
- B.
FSH
- C.
LH
- D.
Oxytocin
- 6.What is the role of active transport in the transmission of nerve impulses by neurones?
- A.
Propagates an action potential by pumping sodium ions across the membrane out of the neurone.
- B.
Propagates an action potential by pumping sodium ions across the membrane into the neurone.
- C.
Initiates the action potential needed for the transmission of an impulse by pumping calcium ions out of the endoplasmic reticulum.
- D.
Establishes the resting potential needed for the transmission of an impulse by pumping sodium and potassium ions across the membrane.
- 7.What are responsible for the lowering of blood glucose levels? I. Beta-cells in the pancreas II. Insulin molecules III. Alpha-cells in the pancreas
- A.
II only
- B.
I and II only
- C.
II and III only
- D.
I, II and III
- 8.How can testis tissue be distinguished from ovary tissue, when seen using a light microscope?
- A.
Testis tissue has a layer of muscle fibres and ovary tissue does not.
- B.
Testis tissue is cooler than ovary tissue.
- C.
Testis tissue contains tubules and ovary tissue does not.
- D.
Testis tissue contains pain receptors and ovary tissue does not.
- 9.The levels of hormones vary during the menstrual cycle in women. Each hormone reaches its maximum level at a different time in the cycle. In what sequence do the hormones reach their maximum level, if the cycle begins at the start of menstruation?
- A.
LH, progesterone, FSH, estrogen
- B.
FSH, progesterone, LH, estrogen
- C.
LH, estrogen, FSH, progesterone
- D.
FSH, estrogen, LH, progesterone
- 10.How is in vitro fertilization different from natural fertilization in humans?
- A.
In vitro fertilization involves artificial injection of sperm into the uterus
- B.
In vitro fertilization only involves one parent
- C.
In vitro fertilization happens outside the body
- D.
In vitro fertilization uses stem cells instead of eggs
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