Answer/Explanation:
ERECTION : the state in which a body part (such as the penis) becomes firm and swollen because of sexual excitement also : the penis when it is in such a state. : the act or process of building or erecting something.
MENSTRUATION : the process in a woman of discharging blood and other materials from the lining of the uterus at intervals of about one lunar month from puberty until menopause, except during pregnancy.
NOCTURNAL EMISSION : an involuntary ejaculation of semen during sleep.
OVUM : a mature female reproductive cell, especially of a human or other animal, which can divide to give rise to an embryo usually only after fertilization by a male cell.
PUBERTY : the period during which adolescents reach sexual maturity and become capable of reproduction.
SPERM : A sperm is a cell which is produced in the sex organs of a male animal and can enter a female animal's egg and fertilize it. Conception occurs when a single sperm fuses with an egg.
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Answer:
Digestive system breakdown small proteins into amino acids by chemical digestion using enzymes (option B).
Explanation:
One of the main functions of the digestive system is to degrade food to facilitate its absorption at the intestinal level. This degradation has a mechanical phase, which includes chewing and contracting the stomach, and an enzymatic phase.
The enzymes that allow the breakdown of proteins into amino acids are called proteases, or peptidases. They are enzymes capable of breaking peptide bonds, obtaining at the end amino acids that can be more easily assimilated by the organism.
<em>The other options are not correct because </em><u><em>mechanical digestion</em></u><em> reduces the size of the digested food and mixes it with the gastric juices, but does not break the peptide bonds.</em>
Static stretch
Explanation:
Static stretching exercises are done by elongating the target muscles as tolerated and then holding the stretch in that position for a stipulating length of time. This holding time period is usually determined by the individual’s age, activity level, any other previous illness or injuries etc.
The holding time usually is around 10-15 seconds is especially done to:
- Reduce risk of injury, muscle stiffness
- Increase mobility, flexibility, range of motion
- Relieve back or joint pains.
The main physiology in stretch reflex:
The stretch reflex is a myotatic reflex which is triggered by the action potentials of la afferent fibers. This causes the excited motor neurons to contract the stretched muscle which in turn reduces the potential.
The holding in static stretching is to make the elongation of the muscles a habitual length for the muscle spindle fibers and mark it is a new length.
The signals are reduced and the receptors are trained to allow more muscle fiber lengthening. The greatest increase in length or increase in range of motion occurs when the stretch is held for about 10-30 seconds with 2-4 repetitions.
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