Pre-TEST

Name:

Matric Num. :

TBF 3033 Animal Physiology


Section A

1. The nervous system performs 3 overlapping functions, except
A. sensory input C. integration
B. differentiation D. motor output

2. Electrical synapses send signals ……………………………………...
A. through synaptic clefts C. through gap junctions
B. using neurotransmitters D. using dopamine

3. The neuron functions are below
i. signal reception ii. signal integration

iii. signal conduction iv. signal transmission
A. i and ii B. i and iv C. i, iii and iv D. i, ii, iii and iv

4. For neuron in its resting state, its membrane potential measure is
A. 70mV B.-70mV C.85mV D.-85mv

5. Opening only sodium ion channels in a neuron at rest would normally cause
A. hyerpolarization C. repolarization
B. depolarization D. no change in membrane potential.

6. Arrange the role of voltage-gated in channels in the action potential
i. Na+ channel closed but K+ channel remain open because of their slow moving gate. K+ keep flowing out of the cell
ii. Na+ channel closed, K+ channel open. K+ leave the cell. The inside of the cell become more negative
iii. Na+ channel open, Na+ rush into the cell. Interior of the cell become more positive. An action potential is generated.
iv.Both K+ and Na+ channel closed.
A. i, ii,iii,iv B. iv, ii,i,iii C. iii,iv, ii,i D. iv, iii,ii,i

7. The process transmission across a synapse is carried out by neurotransmitters. Arrange the process
i. stimulates synaptic vesicles into merge with the presynaptic membrane
ii. neurotransmitter molecules are release into synaptic cleft
iii. sudden rise in calcium at the of one neuron
A. i,ii,iii B. ii,iii,i C. iii,i,ii D. i,iii,ii

8. At chemical synapse
A. acetylcholine is always an excitatory neurotransmitter in the autonomic nervous system.
B. phosphorylation of synapsins stimulates neutransmitter release.
C. repolarization of the axon terminal allows Ca2+ to flow into the axon terminal.
D. neurotransmitters are transported across the synapse by receptor protein.

9. The ________ coordinates body movements and aids in learning motor skills
A. cerebrum B. cerebral cortex C. cerebellum D. midbrain

10. Given these parts of an automatic reflex :
i. afferent neuron iii. affector cell v. sensory receptor
ii. intergrating center iv. efferent neuron
Choose the correct order an action potential travels trough them from a stimulus to the resulting action
A. i,ii,iii,iv,v B. v, i, ii,iv iii C. iii,iv,ii,i,v D. v, iv,ii, i, iii

Section B

Question 1:

a. Name TWO transports involve in a nerve cell to maintain the resting potential. (2m)

b. Name the ions transported as mentioned in 1.a. (2m)

c. Differentiate between temporal and spatial summation. (2m)

d. Label number 2, 4 and 5 showing changes in a nerve cell potential below : (3m)

2)

4)

5)

Question 2:

Serotonin is a neurotransmitter which is produced by certain neurones in the brain. One of its effects is to increase the activity of sensory neurones in the brain. It also usually improves a person’s mood and keeps them awake. The Figure 1 shows a synapse at which serotonin is the neurotransmitter. Label number 1, 2, 3, 4 and 10 in the diagram below:

FIGURE 1

1)

2)

3)

4)

10)

~Good Luck~