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Living Organisms Respond to their Environment. All living organisms are able to react to something important or interesting in their external environment. For example, living organisms constantly respond to their environment. They respond to changes in light, heat, sound, and chemical and mechanical contact.
Answer:
Excitation-contraction coupling refers to the events that link the action potentials on the sarcolemma to activation of the <u>Ca+ channels </u> . It begins with the arrival of the <u>action potential</u> at the neuromuscular junction.
Explanation:
The action potential travels from the neuron and it is transmitted to the muscle through the neuromuscular junction, which is the place where the neuron and the muscle join. Once that the action potential is in the muscle this will open Ca+ channels in order to let the Ca+ enter the muscle fiber and produce the contraction in the sarcomere.
The correct labels of the given structures:
The diagram with labels 1, 2 and 3 is urinary and reproductive organs of human male.
- Urinary bladder
- Vas deferens
- Urethra
The diagram with labels 5, 6, 7 and 8 is urinary and reproductive organs of human female.
5. Fallopian tube or oviduct
6. Uterus
7. Urinary bladder
8. Vaginal canal
Answer:
Nucleus
Explanation:
Known as the cell's “command center,” the nucleus is a large organelle that stores the cell's DNA (deoxyribonucleic acid). The nucleus controls all of the cell's activities, such as growth and metabolism, using the DNA's genetic information.
