Answer:
d. the movement of myosin head while attached to actin myofilament
Explanation:
During muscle contraction, the calcium ions released from the sarcoplasmic reticulum in the sarcoplasm bind to troponin which in turn removes tropomyosin from the myosin-binding sites present on the actin. Hydrolysis of ATP at the myosin heads energize them. These myosin heads with stored energy bind to the myosin-binding sites on the actin filaments. In their bound conditions on the actin filaments, myosin heads are called cross bridges. Only one myosin head of a single myosin molecule forms cross-bridge at a time.
1. Genes are versions of alleles.
2. For each trait, an organism inherits two alleles.
3. The dominant allele determines the phenotype of an organism.
4. Allele pairs separate during the production of gametes so there is only one allele.
<span> Each </span>amino acid<span> consists of a central carbon atom bonded to a hydrogen atom, a carboxyl group, & an</span>amino<span> group, and a specific side chain. </span>
Answer:
a) hypothalamus
Explanation:
Within the hypothalamus are nerve cells that, when activated, produce the sensation of hunger.
