Answer Happy

QUESTION What is a motor unit? A large section of the spinal cord that innervate only one muscle fiber A large section of the spinal cord that can innervate several muscle fibers An axon bundle One motor neuron in the spinal cord and the population of muscle fibers that it innervates.
QUESTION Which of the following statements is true? Stimulation of a single motor unit cannot cause a weak contraction of an entire muscle. Stimulation of a single motor unit can cause a weak contraction of an entire muscle. Motor neurons are not located in the spinal cord. Axons from each motor neuron never branch throughout a muscle.
QUESTION Which of the following do peroxisomes and mitochondria have in common? They have a double membrane. Their only function is to produce energy. They use oxygen. They are found in all cells.
QUESTION What is one way that peroxisomes and mitochondria work together? Peroxisomes carry out oxidative phosphorylation, which allows the mitochondria to produce ATP. Mitochondria code for the enzymes that are used in peroxisomes. Peroxisomes produce acetyl-coA, which enters mitochondria to ultimately produce ATP. Peroxisomes detoxify hydrogen peroxide produced by the mitochondria.
QUESTION Which is true about mitochondria? They degrade long-chain fatty acids. The citric acid cycle takes place in their membrane. They have a single membrane that is folded many times. They can produce some proteins.