When ______________ are active, intrafusal muscle fibers become shorter and hence become much more sensitive to changes in muscle length.
a. gamma motor neurons
b. extrafusal muscle fibers
c. alpha motor neurons
d. intrafusal muscle fibers
Question 2
If asked to move your leg, this response takes longer to complete than if you move your leg in response to what feels like a spider crawling on it. When you respond to the imaginary spider, this response:
a. is reflexive and does not need to be processed deeply to be performed.
b. is planned and requires deeper processing to be performed.
c. is reflexive and requires deeper processing to be performed.
d. is planned and does not need to be processed deeply to be performed.
Many older adults live active lives well into their eighties and beyond.
Labeled diagram and flowchart of the three muscle tissue types.
(A) A neuron connecting to a skeletal muscle.
HIV cycle in an infected cell: (a) latent infection; (b) active infection.
Testing muscle strength using opposing force
Smooth muscle