Answer:
Long tail and narrow head.
Explanation:
A sperm cell is adapted to reduce friction as it swims by having long head, narrow tail and enzymes. These features of sperm provides ability to swim straight to the egg cell. Long tail helps the sperm cell to swim towards the egg cell, narrow head of sperm cell make the sperm cell for faster swimming towards the egg cell and enzymes present in the head of the sperm helps break through the egg cell membrane so we can say that the long tail and narrow head of sperm cells helps in faster swimming.
Answer:
Calcium ions
Explanation:
The excitation-contraction coupling process is the process by which the electrical activation of muscles (the depolarization of the action potential) leads to the activation of contraction.
An action potential in the skeletal muscles or muscle excitation leads to Ca release from the sarcoplasmic reticulum via calcium channel protein. Released Ca regulates the contraction of the muscle.
Wait wait is this a real question are you just joking
Answer:
To place the enzyme in different temperature.
Explanation:
In order to determine the effect of temperature on the activity of the enzyme amylase, we have to place the enzyme amylase in different environment having different temperatures. That environment which increases the activity of enzyme is considered suitable temperature for the enzyme and the temperature at which the activity of enzyme amylase is minimum is considered as bad temperature for the enzyme. For determining the temperature, we have to place the enzyme in different temperature.