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BIOS 260 - LAB FINAL EXAM| Labster & PhysoEx-Qs & As
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BIOS 260 - LAB FINAL EXAM| Labster & PhysoEx-Qs & As
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BIOS 260 - LAB FINAL EXAM| Labster & PhysoEx-Qs &As
How does passive tension change with muscle length Correct Ans-Increases
How does active twitch tension change with muscle length Correct Ans-Increases then
decreases
Tetanus Kinetics Correct Ans-When muscle sustains contraction for a period of time
What could explain the faster contraction and relaxation speeds of the EDL relative to the
soleus Correct Ans-The EDL has more sarcoplasmic retilulum
Why might the EEDL generate a higher force during a single twitch, but the two muscles
generate similar forces when stimulated at 40 Hz Correct Ans-The EDL can release more
calcium with a single twitch, but at 40 Hz, both muscles achieve similar cytoplasmic calcium
levels
If Hormone A causes the production of Hormone B, what would be an example of a negative
feedback mechanism Correct Ans-An increase in Hormone B decreases the production of
Hormone A
, BIOS 260 - LAB FINAL EXAM| Labster & PhysoEx-Qs &
As
Steroid sex hormones suppress the secretion of GnRH, LH, and FSH Correct Ans-True
What would decrease FSH secretion Correct Ans-High levels of androgens
How can we control for the possible effects of the stress of oral injection and the injected oil
when evaluation the effects of the treatments 1 and 2 Correct Ans-Compare treatment 1
and 2 rabbits to rabbits injected orally with oil mixed with banana
How can we control for the possible effects of the stress of oral injection and the injected
saline when evaluating the effects of treatment 3 Correct Ans-Compare treatment 3
rabbits injected orally with banana plus physiological saline
Testosterone and progesterone both act to block endometrial thickening in rabbits Correct
Ans-True
Both testosterone and progesterone exert negative feedback on LH and FSH secretion by the
anterior pituitary Correct Ans-True
, BIOS 260 - LAB FINAL EXAM| Labster & PhysoEx-Qs &
As
Follicle-Stimulating Hormones, FSH Correct Ans-Increases male fertility
DMAU likely suppresses sperm and motility due to negative feedback of testosterone on LH
and FSH secretion Correct Ans-True
Based on the results, what should be investigated next to obtain the best fertility inhibitor for
rabbits Correct Ans-The effect of different doses of progesterone or testosterone on
fertility, health, and vitality of females
Which muscle seems to be more suited to slower, sustained movements like walking
Correct Ans-The solues - Type I
Why might the Soleus show fused tetanus peaks and higher forces at a lower stimulation
frequency than the EDL Correct Ans-The EDL is faster at pumping calcium out of the
cytoplasm.
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