How do Neuroprosthetic devices work? Such devices translate electrical neural activity from the brain into control signals for guiding paralyzed upper limbs, prosthetic arms, and computer cursors. Neural activity from various arm movement-related brain regions is electronically processed to create control signals for enacting the desired movement. What is a neural prosthetic? Neural prostheses (NPs) […]

How does evolution result in new species? Evolution is a process that results in changes in the genetic material of a population over time. Evolution reflects the adaptations of organisms to their changing environments and can result in altered genes, novel traits, and new species. An example of macroevolution is the evolution of a new […]

What happens to the frequency of a recessive allele when selection is against the recessive phenotype? Because of the sheltering effect of heterozygotes, selection against recessive phenotypes changes the frequency of the recessive allele slowly. Therefore, to halve an allele frequency from 1/50 to 1/100 would proceed slowly from 1/50 to 1/51, 1/52, 1/53, and […]

Which term means surgical fixation of a testicle? orchidopexy, orchiopexy. surgical fixation of a testicle – Ex: to bring into the scrotum. Which procedure is most likely to be performed to correct cryptorchidism? orchidopexy What does Orchidopexy mean? Orchidopexy (OR-kid-o-pex-ee) is a surgery to move a testicle that has not descended or moved down to […]

Is cardiac muscle involuntary? Cardiac muscle cells are located in the walls of the heart, appear striated, and are under involuntary control. Which muscles are called involuntary muscles? Smooth muscle, also called involuntary muscle, muscle that shows no cross stripes under microscopic magnification. It consists of narrow spindle-shaped cells with a single, centrally located nucleus. […]

What diagnostic tests can you use to determine an infection? Advertisement Blood tests. A technician obtains a sample of blood by inserting a needle into a vein, usually in the arm. Urine tests. This painless test requires you to urinate into a container. Throat swabs. Stool sample. Spinal tap (lumbar puncture). How is an infection […]

What two gases are exchanged when we are breathing Which do we breathe in and which gas do we breathe out? When you inhale (breathe in), air enters your lungs and oxygen from the air moves from your lungs to your blood. At the same time, carbon dioxide, a waste gas, moves from your blood […]

In which direction is the smooth muscle oriented? circumferential direction Is there smooth muscle in blood vessels? Vascular smooth muscle refers to the particular type of smooth muscle found within, and composing the majority of the wall of blood vessels. What tissues make up each type of Tunica on the arteries and veins? The thick […]

What process does a zygote use to increase the number of cells? mitosis What happens after zygote formation? Blastocyst stage: The single-celled zygote begins to divide into a solid ball of cells. Then, it becomes a hollow ball of cells called a blastocyst, attaching to the lining of the mother’s uterus. Embryonic stage: The major […]

What is real soil? Real soil is the earth’s covering that has been producing bountifully for thousands of years in spite of what the chemical companies want you to believe. Real soil doesn’t come in bags. Real soil is made up of sand, clay, organic matter, water, air, minerals, and a multitude of living organisms. […]