Which nervous system issues a nerve impulse that leads to...

Which nervous system issues a nerve impulse that leads to the contraction of skeletal muscle fiber? a. The peripheral nervous system b. The afferent nervous system c. The autogenic nervous system d. The central nervous system

104. Which part of the nervous system is responsible for the voluntary control of skeletal muscles? A) Autonomic nervous system B) Sympathetic nervous system C) Parasympathetic nervous system D) Somatic nervous system 91.Which part of the brain controls the Pituitary Gland? A. Hindbrain B. Hypothalamus C. Hippocampus D. Midbrain 92.What triggers the opening of Ca2+-sensitive channels in the sarcoplasmic reticulum (SR) during cardiac muscle contraction? a) Sodium influx b) Potassium influx c) Ca2+ influx d) Acetylcholine release 93.During cardiac muscle contraction, what does Ca2+ bind to in order to initiate the sliding of filaments? a) Myosin b) Actin c) Tropomyosin d) Troponin 94.How does the duration of the action potential (AP) and contractile phase in cardiac muscle compare to that in skeletal muscle? a) It is shorter in cardiac muscle b) It is much greater in cardiac muscle c) It is the same in both d) It is shorter in skeletal muscle

Jenny W.