Effector College Essays Samples For Students

Re-uptake involves the reabsorption of neurotransmitters by any of the neurotransmitter receptors or transporters. The transporters involved are usually of pre-synaptic neurons. Re-uptake occurs after the neurotransmitter has transmitted a neural impulse. Re-uptake is very crucial in order for the normal functioning of synapses to take place. This is because it allows the neurotransmitters to be recycled, thereby regulating their levels in the synapse. This in turn dictates the length of time it takes for a signal - generated by neurotransmitter release - to last. Neurotransmitters are usually large hydrophilic molecules that cannot pass through the neuronal membranes. For this reason, ...

a) Explain why the effort of hormonal (Endocrine ) control tends to be slow whereas nervous control is usually very fast.

Endocrine control is normally slower when compared to nervous control majorly because hormones once released by the endocrine gland have to travel via the circulation to reach their target receptors on the effector organ which generally takes more time. Meanwhile, information relayed by nerves is in form of impulses (that is, action potentials generated due to electrical excitation produced by a change in the charge across the surface membrane of the neuron evoked by the stimuli) that simply travel along the ...

In clinical transplantation, an observed complication is that previous red blood cell (RBC) transfusions may reduce the risk of solid organ transplant rejection but increase the risk of bone marrow transplant (BMT) graft failure (Storb and Weiden, 1981). This statement is seemingly a contradiction. It is difficult to understand how RBC transfusions can both reduce the risk of solid organ transplant rejection and increase the risk of BMT rejection.
But this contradiction can be resolved by understanding three considerations. First, the immune system is extremely complex and attempts to control its effects routinely have both positive and negative effects ( ...

Cell Mediated Immunity

Cell mediated is one of the components of the immune response. it involves the expression of cells like natural killer cells, phagocytic cells and antigen-presenting cells. it also involves the release of various forms of cytokines. the varies ways by which cell mediated immunity protect the body includes the activation of macrophages and natural killer cells in order to empower them to destroy antigenic agents like pathogens. it also leads to the formation of substances that modulate the function of cells involved in cell-mediated immunity. In addition, cell-mediated immunity helps in protection of the body by leading to activation ...

Introduction

The body is on an ongoing and continuous quest to maintain an environment characterized with equilibrium. Scientifically, this state is called homeostasis. It is the body’s internal mechanism that is meant to make the person survive, despite the numerous internal and external changes it may encounter. The body of a person who was acutely exposed to a colder than usual environment would, for example, react by preserving the heat that is currently stored in and generated by the body—something which can be done in a lot of ways such as, but may not be limited to vasoconstriction, ...

Salmeterol is part of a broader group of drugs known as adrenergic agonists; it works specifically by binding to β2 receptors of the adrenergic receptor family, which are activated by the binding of the endogenous neurotransmitters, norepinephrine and epinephrine. The adrenergic receptors are as well part of a broader group of receptors known as G-protein coupled receptors. The G-protein receptor family is composed of a single peptide with seven trans-membrane regions that are attached to a G protein, Gs, Gq, or GI (Harvey & Champe, 2008). The G protein has 3 subunits; the α, β, and γ subunits; the α subunit in the resting state is bound to ...

The Central Nervous System is the control system of the human body; it is the core of the human nervous system. The Central Nervous system is made up of the spinal cord and the brain. The brain uses the electrical signal, which is generated by the Central Nervous System. These electrical signals travel via the Peripheral Nervous System effector cells. These effector cells carry out physiological responses whenever the brain demands it. Axonal regeneration occurs successfully in the Peripheral Nervous System. However, regenerative axonal growth starts occurring in the Central Nervous System too, but stops two weeks after the ...

Part ABriefly discuss the signalling process which occurs when salmeterol binds to its targetReceptor

The receptor to which salmeterol binds
The drug salmeterol binds to the active sites of beta-2-adrenergic receptor . This is a category of G protein-coupled receptors. Beta-2-adrenergic receptors have specific actions in the body. They are responsible for the relaxation of smooth muscles relaxation of a non-pregnant uterus, dilation of arteries in the skeletal muscles, contraction of the sphincter muscles and anabolic processes in the skeletal muscle. The receptor has a three dimensional crystallographic structure. The receptors work by ensuring rapid and specific signaling. The receptors couple with Gs G protein, the result being the activation of adenylyl cyclase. The receptors have ...