32. What produces circadian rhythms at the molecular level? a. Light causes glut

Question

32. What produces circadian rhythms at the molecular level? a. Light causes glutamate release b. Feedback loops in protein synthesis c. Receptor and neurotransmitter degradation d. Action potentials e. DNA methylation 33. The surest way to disrupt the biological clock is to damage the: a. Substantia nigra b. Caudate c. Subthalamic nucleus d. Suprachiasmatic nucleus e. Superior colliculus is considered a molecular activater of the circadian clock, whileis considered a 34. molecular repressor of the clock. a. CLOCK, BMALI b. PERIOD, CRYPTOCHROME c. LUCIFERASE, CLOCK d. BMALI, PERIOD e. KODACHROME, LUCIFERASE 35. Do signals from the eye influence the function of the master brain clock? a. b. c. d. NO, there is no pathway between the eye and the master brain clock YES, rods and cones in the eye project axons to the master brain clock YES, retinal ganglion cells detect light and project to the master brain clock YES, but only indirectly through the thalamus 36. The lateral group of descending motor commands from the primary motor cortex is responsible for movements. a. coordinated walking b. independent c. reflexive d. postural e. hand-eye coordinated 37. True or false: The basal ganglia is important for learning and performing automatic, habitual motor actions a. True b. False

Explanation / Answer

32.b)feedback loops in protein synthesis.

Circadian clock gene produce proteins which generate circadian rhythm and inhibit transcriptional activity

through feedback loop while the rest options are stimulators and regulators of circadian oscillators.

33.d)suprachiasmatic nucleus

It is a group of hypothalamic nerve cells and functions as master circadian pacemakers while the other options

are not linked to circadian rythms.

34.d)BMAL1,PERIOD

In option a, both are activators; in option b, both are repressors; in option c, luciferase is a technique to study

circadian rythm and in option e, kodachrome is a film.

35.c) YES, retinal ganglion cells detect light and project to the master brain clock.

Option a and d are inaccurate. In option b,rods and cones contribute to sight.

36.b)independent

The rest are controlled by medial pathway.

37.a)true

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