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What else can I help you with?
What part of the heart's conduction system acts as the primary pacemaker?
The atrioventricular (AV) node which is located in the right atrium. From there is travels down the septum, also called the atrioventricular bundle, and then spreads to all parts of the ventricles via the Purkinje fibers.
What is the function of the chemoreceptors in the carotid arteries and aorta?
I will illistrate my answers with an example: When an individual exercises, the concentration of CO2 in the blood increases, this lowers the pH, making it more acidic. Chemoreceptors in the carotid arteries and aorta detect this decrease in pH. Nerve impulses are sent to the centre of the Medulla Oblongata that increases heart rate. Nerve impulses are then sent via the sympathetic nervous system to the sinoatrial node, this increases the heart rate. Therefore this increases the blood flow to the lungs, CO2 can therefore be removed from the blood by the alveoli in the lungs.
How does water exit a watershed?
Via the mouth of the river into the sea. Also as a watershed just describes where surface water travels in the catchment water can infiltrate into the rock and travel into a different catchment / watershed.
Which blood vessels does it pass through when it leaves the heart?
Systemic via the aorta - pulmonary via the pulmonary artery.
Would it be possible to travel into the hollow earth from Antarctica via a hot air balloon?
The Earth is not hollow; so No.Were the Earth hollow, it might be difficult to control the buoyancy of the hot air balloon sufficiently to enter a hollow Earth at the poles.
How does the human heart operate?
Human heart is myogenic in nature. It consists of sinoatrial node in the right atrium below the endodermis. this node initiates the electrical impulses in heart. As it is initiator it is also called pacemaker of heart. The atrioventricular node gathers the impulses and transmits them to the purkinje fibres via. bundle of his-tawara. As atrioventricular node collects all the impulses it is also called pacesetter of heart.
What does the atrioventricular node cause to contract?
The atrioventricular (AV) node causes the ventricles of the heart to contract. It serves as a critical relay point in the electrical conduction system, receiving impulses from the sinoatrial (SA) node and delaying them briefly before transmitting them to the ventricles via the bundle of His. This delay allows the atria to fully contract and empty their blood into the ventricles before the ventricles contract.
Lymph leaves a lymph node via?
Lymph exits the node at its hilum, the indented region on the concave side, via efferent lymphatic vessels.
How do your hormones travel?
The endocrine glands secrete hormones directly into the bloodstream. The hormones then travel to target tissues via the circulatory system.
How fast do nerves impulses travel?
Nerve impulses travel through nerve fibers via a action potential and the speed at which the impulse travels depends on the type of nerve fibre. This can range from 100m/s in the case of touch to 20-30 m/s when you're thinking.
What are the thick fibers extending from the AV node?
The thick fibers extending from the AV node are known as the bundle of His, or atrioventricular bundle. This structure conducts electrical impulses from the AV node to the ventricles, facilitating coordinated heart contractions. The bundle of His branches into the right and left bundle branches, which further spread the electrical signals throughout the ventricles via Purkinje fibers. This conduction system is essential for maintaining an effective heartbeat.
Primary motor area sends impulses via to control skeletal muscles?
The primary motor cortex send nervous impulses via the pyramidal cells, down the pyramidal tracts in the spinal cord.
The absorbed nutrients travel to the liver via the?
Absorbed nutrients from the intestines travel to the liver via the hepatic portal vein. This vein carries blood rich in nutrients from the intestines directly to the liver for processing and storage. Once in the liver, the nutrients are metabolized and distributed to the rest of the body as needed.
What contains receptor that convert sound vibrations to impulses sent to the brain?
The cochlea in the inner ear contains receptors called hair cells that convert sound vibrations into electrical impulses. These impulses are then sent to the brain via the auditory nerve, where they are interpreted as sound.
How are messages from the femoral nerve sent to the brain?
Messages from the femoral nerve are sent to the brain through a series of electrical impulses. These impulses travel along the nerve fibers of the femoral nerve until they reach the spinal cord, where they are then transmitted up to the brain via the spinal cord's sensory pathways. Once in the brain, the messages are interpreted and processed to produce a response or sensation.
What transmits impulses in the ear?
Impulses in the ear are transmitted by hair cells located in the cochlea. These hair cells convert sound vibrations into electrical signals that are then sent to the brain via the auditory nerve.
Suprachiastic nuclei carry nerve impulses from the retina of the eye to the what?
When light enters the retina of the eyes, this signal is sent through the optic nerve to a region of the hypothalamus called the suprachiasmatic nucleus. This pathway is called the retinohypothalamic tract. From the suprachiasmatic nucleus, nerve impulses via the sympathetic nervous system travel to the pineal gland and inhibit the production of melatonin. At night, these impulses stop (because no light stimulates the hypothalamus) and melatonin production ensues and is released into the body.
