In a muscle contraction, the sarcomere shortens when ____
a. the myosin heads move in opposite directions
b. the myosin heads move towards each other
c. the actin filaments move in opposite directions
d. the actin-myosin cross-bridge disconnects
e. ATP is formed from ADP and Pi
ANSWER: b
You might also like to view...
This figure, and specifically the area with the question mark, depicts which concept?
1.The sea breeze
2.The land breeze
3.The rain shadow
4.The El Niño
In seed plants, __________ allow reproduction
without standing water. Fill in the blank(s) with the appropriate word(s).
The right atrium receives what kind of blood from the rest of the body in a frog?
What will be an ideal response?
Which organism would be least likely to be able to survive rapid global climate change?
A. A self-compatible plant species (can use its own pollen to produce viable seeds) with wind-dispersed seeds and a fast growth rate B. An omnivorous, endothermic animal species with a short generation time C. A crustacean that tolerates a wide range of temperatures and can reproduce sexually or asexually D. An insect species that lays its eggs and feeds upon a single plant species with a short flowering period