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Iris muscles!
The circular muscles contract to reduce the size of the pupil in bright light. Radial muscle fibres contract to widen the pupil in places of low light intensity. The contraction and relaxation of circular and radial muscle fibres in the iris are antagonistic, and an example of cerebral reflex.
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∙ 12y ago
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∙ 15y agoThe Levator palpebrae superioris (or levator muscle of upper eyelid) physically controls the blinking of the eyes.
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∙ 14y agoAmong the brain stem's (cerebrum) functions is the blinking control function.
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∙ 12y agoThe Nervous System
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∙ 12y agothe nervous system
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∙ 13y agoThe medulla
Anonymous
The brain stem
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What part of the brain controls the urinary system?
For the most part the brain doesn't directly control the urinary system but their is some control over the rate of glomerular filtration by the sympathetic nervous system.
What system controls an animal's organ system-circulatory system-excretory system-and nervous system?
We can say all the systems controls each other but the whole body is controlled by Nervous system and Endocrine System. The Endocrine System by hormones controls the excretory system and controls the nervous system during emergency by releasing Adrenaline hormone. So all organ systems controls each other.
What does the autonomic nervous system direct?
The autonomic nervous system is the system by which the body controls the processes required to survive that happen without the body having to think about them. This includes processes such as breathing, digestion, heart rate and salivation.
What is the hormone that controls the rate at which you grow?
the growth hormone
What organ system controls cell function by hormone actions?
The endocrine system controls cell function by hormone action.
What body system controls heart rate and breath rate?
The nervous system controls heart and respiratory rates.
Which body system controls the rate at which the circulatory and respiratory work?
The nervous system controls the rate of the heartbeat and respiration.
What controls the breathing rate?
your respiratory system/lungs
What organ of the endocrine system controls cell metabolic rate?
thyroid
Breathing is a function controlled by the autonomic nervous system?
The nervous system controls breathing rate.
How do the heart control your heart rate when you exercise?
your heart gets controls by your nervous system
What system in the body controls automatic actions like heart rate and blood pressure?
Nervous system, with the help of endocrine.
What is the Ethernet activity LED blink rate?
Different manufacturers use different blink rates. It is the choice of the designer. There isn't any standard blink rate. Data packets flowing on the cable move so quickly that if a blink rate was not used, the LED would flash too quickly, and it would be hard to see it working.
What substance in the blood controls the rate of respiration?
A substance in the blood that controls the rate of respiration is Carbon Dioxide. It stimulates the brain that controls the respiratory rate.
What does autonomic nervous system control?
It controls involuntary actions such as heart rate, digestion, respiration rate, salivation, perspiration, sexual arousal, and urination.
What body system helps control the actions of when your heart begins to pound and your breathing becomes rapid?
The nervous system controls heart rate and respiratory rate. It may be influenced by the endocrine system as well. A rapid heart and breathing rate are typical results of activation of the sympathetic nervous system.
What system is the nervous system related to?
The nervous system controls the rate of the heart. In turn the cardiovascular system brings oxygen & nutrients to the brain & the removes all the waste.
